998687420 has 24 divisors (see below), whose sum is σ = 2126785248. Its totient is φ = 393848000.

The previous prime is 998687419. The next prime is 998687449. The reversal of 998687420 is 24786899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350231 + ... + 353070.

It is an arithmetic number, because the mean of its divisors is an integer number (88616052).

Almost surely, 2^998687420 is an apocalyptic number.

It is an amenable number.

998687420 is an abundant number, since it is smaller than the sum of its proper divisors (1128097828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

998687420 is a wasteful number, since it uses less digits than its factorization.

998687420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703381 (or 703379 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 998687420 is about 31602.0160749279. The cubic root of 998687420 is about 999.5622817640.

The spelling of 998687420 in words is "nine hundred ninety-eight million, six hundred eighty-seven thousand, four hundred twenty".